Conductive module and power storage device

Abstract

To provide a conductive module excellent in workability in a conductive connection with a detection target.SOLUTION: A conductive module 103 includes: a voltage detection terminal 110 having a first location 112a configured to be conductively connected to a conductive board 104; a temperature measurer 170 including a temperature-measuring element 171; housings 140, 160 assembled to the conductive board 104, the housings having a terminal accommodating recess 142 accommodating the voltage detection terminal 110 and a temperature measurer accommodating recess 161 accommodating the temperature measurer 170, respectively; a heat-conductive filler 183 disposed in a recessed groove of the temperature measurer accommodating recess 161; a cover 130 configured to be locked to the housing 140 at a temporary locking position where the first location 112a of the voltage detection terminal 110 accommodated in the terminal accommodating recess 142 is not covered and a final locking position where the first location 112a is covered. A part of the conductive board 104 is exposed in the recessed groove of the temperature measurer accommodating recess 161. The filler 183 is arranged to come into contact with both the temperature-measuring element 171 and the part of the conductive board 104.SELECTED DRAWING: Figure 13

Description

[Technical Field]

[0001] The present invention relates to a conductive module including a conductive plate as a detection target and a plate-shaped housing that houses a voltage detection terminal and a temperature detector, and to an electricity storage device using the conductive module. [Background technology]

[0002] Conventionally, stacked energy storage devices have been proposed, which are configured by repeatedly stacking thin, chargeable and dischargeable energy storage modules and conductive plates in an alternating arrangement, thereby connecting multiple energy storage modules in series via the conductive plates. The energy storage modules used in this type of energy storage device generally have a structure in which multiple battery cells are built in and function as a single chargeable and dischargeable battery. In one conventional energy storage device, in order to monitor the output state of each energy storage module (i.e., the potential of the output surface of each energy storage module relative to a reference zero potential; hereinafter, also simply referred to as the "voltage of the energy storage module"), detection terminals such as bus bars are connected to conductive plates in contact with the output surface of each energy storage module, and the voltage of each energy storage module is measured via these detection terminals (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-161340 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when actually connecting a bus bar or the like to a conductive plate in an energy storage device having the above-described structure, it is difficult to secure space for installing other connection components (e.g., bolts for bolt fastening) because the energy storage module and the conductive plate are thin-plate shaped. Therefore, in the above-described conventional energy storage device, insertion holes for inserting detection terminals are provided on the side edges of the conductive plate, and the detection terminals are connected to the conductive plate by inserting the detection terminals into the insertion holes of each conductive plate from the side of the stack of energy storage modules and conductive plates. However, with this conventional connection method, it is difficult to improve the workability of the connection work because it is cumbersome to align the insertion holes of the conductive plate with the detection terminals when inserting the detection terminals.

[0005] An object of the present invention is to provide a conductive module that is easy to work with for conductive connection to a detection target, and a power storage device that uses the conductive module. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the conductive module and the power storage device according to the present invention have the following features.

[0007] A conductive plate; a voltage detection terminal having a first portion conductively connected to the conductive plate; a temperature measuring device having a temperature measuring element and a case for holding the temperature measuring element; a plate-shaped housing having a terminal accommodating recess for accommodating the voltage detection terminal and a temperature detector accommodating recess for accommodating the temperature detector, the plate-shaped housing being assembled to the conductive plate; a heat-conductive filler material disposed in the recessed groove of the temperature measuring device receiving recess; a cover that can be engaged with the housing at a temporary engagement position that does not cover the first location of the voltage detection terminal accommodated in the terminal accommodating recess, and at a full engagement position that covers the first location; an electric wire electrically connected to a second location of the voltage detection terminal and drawn out toward the outside of the housing; A conductive module comprising: The housing includes: a portion of the conductive plate is exposed in the recessed groove of the thermometer accommodating recess, The filler is The temperature measuring element is arranged to contact both the temperature measuring element and the part of the conductive plate. It is a conductive module.

[0008] the conductive module; a chargeable and dischargeable storage module in which the conductive modules are stacked; It is a power storage device comprising: [Effects of the Invention]

[0009] According to the conductive module and energy storage device of the present invention, the voltage detection terminal, to which the electric wire is connected at a second location, is accommodated in the terminal accommodation recess of the housing, and the cover can be engaged with the housing while the first location of the voltage detection terminal is exposed. Therefore, when electrically connecting the voltage detection unit to a detection target (e.g., a conductive plate used in a stacked energy storage device), the voltage detection unit can be assembled to the detection target, and then the exposed first location of the voltage detection terminal can be fixed to the detection target using techniques such as ultrasonic bonding or welding. This eliminates the need for additional connection components compared to typical bolt fastening, and facilitates alignment of the two and reduces contact resistance at the contact points compared to the conventional connection methods described above. After connecting the detection target and the voltage detection terminal, placing the cover in the fully engaged position protects the first location of the voltage detection terminal (i.e., the contact point between the two).

[0010] Furthermore, by accommodating the thermometer in the thermometer accommodating recess of the housing, the temperature measuring element of the thermometer and a portion of the conductive plate exposed in the groove of the thermometer accommodating recess are both placed in the groove, and a heat-conductive filler (e.g., a sealant that is soft when filled and hardens over time) is placed in the groove so as to contact both the temperature measuring element and the portion of the conductive plate. This makes it less likely that an air gap will form between the two, which would hinder heat transfer, compared to when the temperature measuring element and the conductive plate are simply placed next to each other. This allows the thermometer to accurately measure the temperature of the conductive plate (in other words, for example, the temperature of the energy storage module transmitted through the conductive plate in a stacked energy storage device).

[0011] Therefore, the conductive module and the power storage device according to the present invention are excellent in workability for conductive connection with the detection object. Furthermore, the conductive module and the power storage device according to the present invention can improve the accuracy of temperature measurement by a thermometer.

[0012] The present invention has been briefly described above. The details of the present invention will become clearer by reading the following detailed description of the invention (hereinafter referred to as "embodiments") with reference to the accompanying drawings. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a partially exploded perspective view of a stacked-type electricity storage device including a conductive module according to an embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. [Figure 3] FIG. 3 is an enlarged view of part B in FIG. [Figure 4] FIG. 4 is an exploded perspective view of a voltage detection unit that constitutes the conductive module shown in FIG. [Figure 5] FIG. 5 is a top view showing a state in which the cover is locked to the first housing at the full locking position. [Figure 6] FIG. 6 is a cross-sectional view taken along line CC in FIG. [Figure 7]7 is a perspective view showing a conductive plate, a second housing, and a thermistor that constitute the conductive module shown in FIG. [Figure 8] FIG. 8 is a perspective view of the thermistor shown in FIG. [Figure 9] FIG. 9 is a front view of the thermistor shown in FIG. [Figure 10] FIG. 10 is a top view showing a state in which the thermistor is accommodated in the second housing. [Figure 11] 11 is a perspective view showing a state in which a sealant is applied to the upper surface of the second housing and filled into the recessed groove of the thermistor accommodating recess shown in FIG. [Figure 12] 12 is a top view showing a state in which a sealant is applied to the upper surface of the second housing and filled into the recessed groove of the thermistor accommodating recess shown in FIG. [Figure 13] FIG. 13 is a cross-sectional view taken along line DD in FIG. [Figure 14] FIG. 14 is a cross-sectional view taken along the line EE of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] <Embodiment> Hereinafter, a conductive module 103 according to an embodiment of the present invention and a power storage device 101 using the conductive module 103 will be described with reference to the drawings. For ease of explanation, the following terms are defined as shown in FIG. 1 and other figures: "front-rear direction," "left-right direction," "up-down direction," "front," "rear," "left," "right," "up," and "down." The "front-rear direction," "left-right direction," and "up-down direction" are perpendicular to each other.

[0015] As shown in Fig. 1, the energy storage device 101 is configured by stacking rectangular thin plate-shaped chargeable and dischargeable energy storage modules 102 and rectangular thin plate-shaped conductive modules 103 that can electrically connect adjacent energy storage modules 102 alternately in the vertical direction. In the energy storage device 101, the multiple energy storage modules 102 are electrically connected in series via the conductive modules 103. The energy storage module 102 has a structure in which multiple battery cells (not shown) are built in, and the energy storage module 102 as a whole functions as a single chargeable and dischargeable battery.

[0016] 1, the conductive module 103 is configured to have an overall rectangular thin plate shape, including a rectangular thin plate-shaped conductive plate 104 (note that the conductive plate 104 also functions as a heat sink, as will be described later), a rectangular thin plate-shaped voltage detection unit 105 connected to the right side of the conductive plate 104, and a rectangular thin plate-shaped temperature detection unit 106 connected to the left side of the conductive plate 104. As shown in FIGS. 1 to 3 (see FIG. 2 in particular), the conductive plate 104 and the voltage detection unit 105 are connected to each other by fitting a flange portion 104a extending in the front-rear direction provided on the right end face of the conductive plate 104 into a recessed portion 105a extending in the front-rear direction provided on the left end face of the voltage detection unit 105. The conductive plate 104 and the temperature detection unit 106 are connected to each other by fitting a flange portion 104b extending in the front-to-rear direction on the left end surface of the conductive plate 104 into a recess portion 106a extending in the front-to-rear direction on the right end surface of the temperature detection unit 106.

[0017] 2, in each conductive module 103 located between vertically adjacent power storage modules 102, the conductive plate 104 is in direct contact with the upper and lower power storage modules 102. Therefore, the conductive plate 104 functions to provide electrical continuity between the lower surface of the upper power storage module 102 and the upper surface of the lower power storage module 102, and also functions as a heat sink that releases heat generated from the upper and lower power storage modules 102 to the outside.

[0018] In each conductive module 103 located between vertically adjacent storage modules 102, the voltage detection unit 105 has a voltage detection terminal 110 (see FIG. 2, etc.) described below that contacts the conductive plate 104. The voltage detection unit 105 functions to output a signal indicating the voltage between the upper and lower storage modules 102 (specifically, the potential of the top surface (output surface) of the lower storage module 102 relative to a reference zero potential) via an electric wire 120 (see FIG. 1, etc.) connected to this voltage detection terminal 110.

[0019] In each conductive module 103 located between vertically adjacent power storage modules 102, the temperature detection unit 106 includes a thermistor 170 (see FIGS. 1 and 10, etc.) described below that is disposed adjacent to a part of the conductive plate 104 (more specifically, the flange portion 104b). The temperature detection unit 106 functions to output a signal indicating the temperature of the conductive plate 104 (and therefore the power storage modules 102 that are in contact with the conductive plate 104 from above and below) via an electric wire 190 (see FIG. 1, etc.) connected to the thermistor 170.

[0020] Next, a specific configuration of the voltage detection unit 105 will be described with reference to Figures 4 to 6. As shown in Figure 4, the voltage detection unit 105 includes a first housing 140, a voltage detection terminal 110 housed in the first housing 140, an electric wire 120 connected to the voltage detection terminal 110 and housed in the first housing 140, and a cover 130 attached to the first housing 140.

[0021] The voltage detection terminal 110 is accommodated in a terminal accommodating recess 142 (see FIG. 4) (described later) formed in the first housing 140, the electric wire 120 is accommodated in a wire accommodating recess 146 (see FIG. 4) (described later) formed in the first housing 140, and the cover 130 is attached to a cover attachment recess 141 (see FIG. 4) (described later) formed in the first housing 140. Each of the components constituting the voltage detection unit 105 will be described below in order.

[0022] First, the voltage detection terminal 110 will be described. The metal voltage detection terminal 110 is formed by performing processing such as pressing on a single metal plate. The voltage detection terminal 110 is accommodated from above in a terminal accommodating recess 142 of a first housing 140. As shown in FIG. 4, the voltage detection terminal 110 has a rectangular flat plate-like first portion 111 extending in the front-to-rear direction and a rectangular flat plate-like second portion 112 extending leftward from the front end of the first portion 111, and has a generally L-shaped flat plate-like shape as a whole when viewed from the top-to-bottom direction.

[0023] One end of the electric wire 120 is fixed to the underside of the tip end 111a (i.e., the end on the rear end side) of the first portion 111 so as to be electrically connected. The other end of the electric wire 120 is connected to a voltage measurement device (not shown) outside the power storage device 101. A part of the flange portion 104a of the conductive plate 104 is fixed to the underside of the tip end 112a (i.e., the end on the left end side) of the second portion 112 by a method such as ultrasonic bonding or welding (see FIG. 3).

[0024] A protrusion 113 that protrudes forward is formed on the front edge of the second portion 112. When the voltage detection terminal 110 is housed in the first housing 140, the protrusion 113 is locked into a locking groove 145 (see FIG. 4) formed in the first housing 140.

[0025] Next, the cover 130 will be described. The cover 130 is a resin molded product, and is attached to the cover attachment recess 141 of the first housing 140 from the right side. The cover 130 is composed of a facing portion 131 and an extending portion 132 that extends rearward from the facing portion 131. The facing portion 131 mainly functions to cover and protect the voltage detection terminal 110, and the extending portion 132 mainly functions to cover and protect the electric wire 120.

[0026] The facing portion 131 is composed of a pair of identical flat plate portions 133 facing each other with a gap in the vertical direction, and a connecting portion 134 that connects the right end edges of the pair of flat plate portions 133 extending in the front-rear direction along the entire front-rear direction. The facing portion 131 has a generally U-shaped configuration that opens to the left when viewed from the front-rear direction. Each flat plate portion 133 is composed of a generally square flat plate-like base portion 133a connected to the connecting portion 134 and a rectangular flat plate-like extending portion 133b that extends leftward from the front end of the base 133a, and has a generally L-shaped configuration as a whole when viewed from the vertical direction. The extending portion 132 extends flush and continuously rearward from the rear end edge of the upper flat plate portion 133 (more specifically, the upper base portion 133a) of the pair of flat plate portions 133 that make up the facing portion 131, and has a generally rectangular flat plate-like configuration.

[0027] A pair of wire holding pieces 135 extending in the left-right direction are integrally formed on the extending portion 132 so as to be spaced apart in the front-rear direction. Each wire holding piece 135 protrudes downward from the underside of the extending portion 132, extends in the left-right direction, and protrudes further leftward from the left edge of the extending portion 132. When the cover 130 is attached to the first housing 140, the wire holding piece 135 functions to hold the wires 120 housed in the first housing 140.

[0028] A locking portion 136 that protrudes upward toward the upper flat plate portion 133 is formed at a predetermined location on the lower flat plate portion 133 (more specifically, the lower base portion 133a) of the pair of flat plate portions 133 that make up the facing portion 131 (see FIG. 6). The locking portion 136 functions to lock the cover 130 at a temporary locking position (not shown) and a regular locking position (see FIGS. 5 and 6) in cooperation with a temporary locking portion 154 and a regular locking portion 155 (see FIG. 6) that are provided on the first housing 140 and will be described later.

[0029] Next, the first housing 140 will be described. The first housing 140 is a resin molded product, and has a generally rectangular thin plate shape extending in the front-rear direction as shown in Figures 1 and 4. A recess 105a that is recessed to the right and extends in the front-rear direction is formed on the left end surface of the first housing 140. A flange portion 104a of the conductive plate 104 is fitted into the recess 105a (see Figure 2, etc.).

[0030] At the locations on the top and bottom surfaces of first housing 140 where cover 130 is attached, cover attachment recesses 141 are formed that are recessed and have a shape that corresponds to the overall shape of cover 130 (see FIG. 4). The recess depth (depth in the vertical direction) of cover attachment recess 141 is equal to the thickness of the resin material that makes up cover 130 (facing portion 131+extending portion 132). Therefore, when cover 130 is attached to first housing 140, the surfaces of first housing 140 and cover 130 become flush with each other (see FIGS. 1 and 5).

[0031] A terminal accommodating recess 142 having a shape corresponding to the overall shape of the voltage detection terminal 110 is formed in the bottom surface 141a of the cover mounting recess 141 on the upper surface side of the first housing 140 at a location where the voltage detection terminal 110 is accommodated (see FIG. 4). The recess depth (depth in the vertical direction) of the terminal accommodating recess 142 is equal to the plate thickness of the voltage detection terminal 110. Therefore, when the voltage detection terminal 110 is mounted in the first housing 140, the upper surface of the voltage detection terminal 110 and the bottom surface 141a of the cover mounting recess 141 are flush with each other.

[0032] A notch 143 that is recessed to the right in a substantially rectangular shape when viewed from the top and bottom is formed on the left edge of the first housing 140 at a position in the front-to-back direction where the tip 112a of the voltage detection terminal 110 is located. The recess 105a that extends in the front-to-back direction on the left end face of the first housing 140 is divided by the notch 143. When the voltage detection terminal 110 is accommodated in the first housing 140, the top and bottom surfaces of the tip 112a of the voltage detection terminal 110 are exposed by the notch 143.

[0033] A through-hole 144 extending in the front-rear direction and penetrating in the up-down direction is formed in the terminal accommodating recess 142 at a location where the tip end 111a of the voltage detection terminal 110 is disposed. When the voltage detection terminal 110 is accommodated in the first housing 140, one end (contact point) of the electric wire 120 connected to the voltage detection terminal 110 enters the through-hole 144. In other words, the through-hole 144 functions as a relief portion to prevent interference between the bottom surface 142a of the terminal accommodating recess 142 and the one end of the electric wire 120.

[0034] In the terminal accommodating recess 142, a locking groove 145 is formed on the inner wall surface at the location where the protrusion 113 of the voltage detection terminal 110 (see Figure 4) is arranged, which is recessed forward and communicates with the recess 105a to correspond to the protrusion 113 (see Figure 4).

[0035] An electric wire accommodating recess 146 is formed in a portion of the top surface of the first housing 140 where the electric wire 120 is accommodated, and is recessed to have a shape corresponding to the routing form of the electric wire 120 when the electric wire 120 is accommodated (see FIG. 4 ). The electric wire accommodating recess 146 is a series of grooves made up of a pair of straight portions 147 that extend linearly in the front-rear direction and are spaced apart in the front-rear direction, and a bent portion 148 that connects the pair of straight portions 147 and extends while bending so as to protrude to the right. The front end of the front straight portion 147 of the pair of straight portions 147 communicates with the terminal accommodating recess 142, and the rear end of the rear straight portion 147 of the pair of straight portions 147 forms an electric wire outlet 149 through which the electric wire 120 extends from the rear end edge of the first housing 140. In this way, by having the bent portion 148, even if an unintended external force acts on the electric wire 120 pulled out from the first housing 140, the electric wire accommodating recess 146 can resist the external force due to friction between the bent portion 148 and the electric wire 120, compared to when the electric wire accommodating recess 146 is configured only with the straight portion 147. Therefore, a large external force is unlikely to act on the contact point between the voltage detection terminal 110 and the electric wire 120.

[0036] Narrow recesses 151, which are recesses whose width (distance in the left-right direction) is narrower than that of the straight portions 147, are provided in the pair of straight portions 147 near the boundary between the pair of straight portions 147 and the bent portions 148. The width of the narrow recesses 151 is slightly smaller than the outer diameter of the electric wire 120. Therefore, the narrow recesses 151 function to clamp the electric wire 120 while pressing it in the left-right direction. By clamping the electric wire 120 between the pair of narrow recesses 151, even if an unintended external force is applied to the electric wire 120 pulled out of the first housing 140, the external force can be resisted by the friction between the narrow recesses 151 and the electric wire 120. Therefore, a large external force is unlikely to be applied to the contact point between the voltage detection terminal 110 and the electric wire 120. Furthermore, it is possible to strongly prevent the electric wire 120 from being routed so as to slip out of the bent portion 148 and straddle the bent portion 148 (i.e., to shortcut the bent portion 148).

[0037] As shown in Fig. 4, a pair of wire holding piece recesses 152 extending in the left-right direction are formed at positions on the bottom surface 141a of the cover mounting recess 141 on the upper surface side of the first housing 140 where the pair of wire holding pieces 135 of the cover 130 are to be disposed, and are spaced apart in the front-rear direction to correspond to the pair of wire holding pieces 135. The pair of wire holding piece recesses 152 are disposed so as to sandwich a bending vertex 148a (see Fig. 4) of the bending portion 148 of the wire accommodating recess 146 therebetween in the front-rear direction. The bottom surfaces of the pair of wire holding piece recesses 152 are located above the bottom surface of the wire accommodating recess 146.

[0038] Each electric wire holding piece recess 152 extends in the left-right direction from the right edge of the upper surface of the first housing 140, across the electric wire accommodating recess 146, to the left-end inner wall 141b (see FIG. 4) of the cover attachment recess 141. Storage holes 153 recessed toward the left are formed in the left-end inner wall 141b of the cover attachment recess 141 at locations where the pair of electric wire holding piece recesses 152 connect (see FIG. 4). When the cover 130 is attached to the first housing 140, the extending ends (i.e., left ends) of the pair of electric wire holding pieces 135 of the cover 130 are inserted into and stored in the pair of storage holes 153.

[0039] 6, at the same front-rear position as the locking portion 136 of the cover 130 is disposed on the bottom surface 141a of the cover mounting recess 141 on the underside of the first housing 140, a temporary locking portion 154, which is a recess recessed toward the top, and a permanent locking portion 155 are formed lined up in this order from right to left with a gap between them. The components that make up the voltage detection unit 105 have been described above.

[0040] Next, the specific configuration of the temperature detection unit 106 will be described with reference to FIGS. 7 to 14. As shown in FIG. 7, the temperature detection unit 106 includes a second housing 160, a thermistor 170 housed in the second housing 160, and an electric wire 190 connected to the thermistor 170. The thermistor 170 is housed in a thermistor housing recess 161 (see FIG. 7, etc.) described below that is formed in the second housing 160. Below, each of the components that make up the temperature detection unit 106 will be described in order. The thermistor 170 corresponds to the "thermometer" in the present invention, and the thermistor element 171 corresponds to the "temperature measuring element" in the present invention.

[0041] First, the second housing 160 will be described. The second housing 160 is a resin molded product, and as shown in Figures 1 and 7, has a generally rectangular thin plate shape extending in the front-rear direction. A recess 106a that is recessed to the left and extends in the front-rear direction is formed on the right end surface of the second housing 160 (see Figures 2, 13, and 14). A flange portion 104b of the conductive plate 104 is fitted into the recess 106a (see Figures 2, 13, and 14).

[0042] A thermistor accommodating recess 161 having a shape corresponding to the overall shape of the thermistor 170 is formed on the upper surface near the rear end of the second housing 160, which extends in the front-to-rear direction (see FIG. 7). The depth (vertical depth) of the thermistor accommodating recess 161 corresponds to the thickness (vertical length) of the thermistor 170. Therefore, when the thermistor 170 is attached to the second housing 160, the surface of the second housing 160 and the surface of the thermistor 170 are flush with each other (see FIGS. 1 and 10, etc.).

[0043] As shown in Figure 7 and other figures, the thermistor accommodating recess 161 is composed of a first recess 162 extending in the left-right direction and a second recess 163 extending in a direction inclined rearward and leftward from the left end of the first recess 162 (hereinafter referred to as the "longitudinal direction"). The right end of the first recess 162 communicates with a portion of the front-rear direction of a recess 106a extending in the front-rear direction of the second housing 160. Therefore, when the flange portion 104b of the conductive plate 104 is fitted into the recess 106a, a portion of the front-rear direction of the flange portion 104b of the conductive plate 104 (hereinafter sometimes simply referred to as "portion 104b of the conductive plate 104") is exposed in the recess groove at the right end of the first recess 162 (see Figures 7 and 10 and other figures).

[0044] As shown in FIG. 7 and other figures, one longitudinal end of the second recess 163 extending in the longitudinal direction communicates with the left end of the first recess 162, and the other longitudinal end of the second recess 163 communicates with the outside of the second housing 160 via a communicating recess 164. The recess depth (vertical depth) of the first recess 162 is smaller than the recess depth (vertical depth) of the second recess 163 (see FIG. 13). The bottom surface of the first recess 162 is continuous with the lower inner wall surface of the recess 106a without any step (see FIG. 13). A through-hole 165 is formed in the longitudinal center of the bottom surface of the second recess 163, penetrating in the vertical direction and having a shape corresponding to a pair of holding portions 174 (more specifically, a pair of side wall portions 176; see FIG. 8 and other figures) provided on a case 172 of the thermistor 170 (described later) (see FIG. 7). At four positions adjacent to the through hole 165 on the inner surface on both sides of the second recess 163, in front and behind, there are formed locking holes 166 that are recessed outward in the width direction (direction perpendicular to the longitudinal direction) of the second recess 163, corresponding to the four locking protrusions 179 (see Figure 7, etc.) provided on the case 172 of the thermistor 170.

[0045] Next, the thermistor 170 will be described. As shown in FIG. 10 and other figures, the thermistor 170 is accommodated in the second recess 163 of the thermistor accommodating recess 161. For this reason, the thermistor 170 has a shape with a longitudinal direction corresponding to the longitudinal direction of the second recess 163, and is composed of a thermistor element 171 constituting a temperature measuring element, and a case 172 that holds the thermistor element 171 (see FIGS. 7 and 8 and other figures). In this example, the thermistor element 171 has a substantially rectangular parallelepiped shape extending in the longitudinal direction (see FIG. 8 and other figures). An electric wire 190 extends from the other longitudinal end of the thermistor element 171.

[0046] 8 and other figures, the case 172 is made of resin and includes a rectangular, flat top plate 173 extending in the longitudinal direction, and a pair of holders 174 extending downward from the longitudinal centers of both widthwise edges of the top plate 173. The top plate 173 functions to close the opening of the second recess 163 when the thermistor 170 is accommodated in the second recess 163 of the thermistor accommodating recess 161 (see FIG. 10 and other figures), and the pair of holders 174 functions to hold the thermistor element 171.

[0047] More specifically, as shown in FIGS. 8 and 9, the pair of holding portions 174 includes a pair of flat vertical wall portions 175 extending downward from both widthwise edges of the top plate portion 173, and a pair of flat horizontal wall portions 176 extending inward in the widthwise direction from the extending ends (lower ends) of the pair of vertical wall portions 175. A widthwise gap exists between the extending ends (inner widthwise ends) of the pair of horizontal wall portions 176. The pair of holding portions 174 is provided with a pair of flat rear wall portions 177 extending in the up-down and widthwise directions so as to vertically connect the rear end edges of the pair of horizontal wall portions 176 to the top plate portion 173 and also to the rear end edges of the pair of vertical wall portions 175 (see FIG. 9). A widthwise gap also exists between the inner widthwise ends of the pair of rear wall portions 177. Furthermore, the pair of holding portions 174 are provided with a pair of locking protrusions 178 for locking the thermistor element 171, which extend inward in the width direction from the inner widthwise surfaces of the pair of vertical wall portions 175 (see FIG. 9).

[0048] Four locking projections 179 are formed so as to protrude downward at four positions adjacent to the front and rear of the pair of holding portions 174 on both widthwise side edges of the top plate portion 173. A pair of flat plate-shaped rear wall portions 181 are formed so as to protrude downward at both widthwise ends of the rear end edge of the top plate portion 173. Furthermore, a flat plate-shaped extending plate portion 182 is formed so as to extend further rearward at the widthwise central portion of the rear end edge of the top plate portion 173. The extending plate portion 182 functions to close the opening of the communicating recess 164 when the thermistor 170 is accommodated in the second recess 163 of the thermistor accommodating recess 161 (see FIG. 10 etc.).

[0049] To assemble the thermistor element 171 to the case 172 (to have it held by the pair of holding portions 174 of the case 172), first, with the entire thermistor element 171 positioned on one side of the pair of holding portions 174 in the longitudinal direction, the electric wire 190 extending rearward from the thermistor element 171 is inserted into the gap between the pair of lateral wall portions 176 and the pair of inner wall portions 177, and into the gap between the pair of rear wall portions 181. Next, the thermistor element 171 is inserted from one side to the other in the longitudinal direction into the space defined by the pair of holding portions 174 (= vertical wall portions 175 + lateral wall portions 176). During this insertion process, the pair of locking projections 178 slide on the outer surfaces of both sides of the thermistor element 171, and the thermistor element 171 moves relatively to the other side in the longitudinal direction within the space. When the other longitudinal end of thermistor element 171 abuts against the pair of rear wall portions 177, assembly of thermistor element 171 into case 172 is complete, and thermistor element 171 is locked and held so as to be sandwiched in the width direction by the pair of locking protrusions 178 (see FIGS. 8 and 9). When assembly of thermistor element 171 into case 172 is complete, as shown in FIGS. 7 and 8, one longitudinal end of thermistor element 171 protrudes to one longitudinal side from one longitudinal end of case 172 (more specifically, top plate portion 173) and is exposed to the outside. The components that make up temperature detection unit 106 have been described above.

[0050] Next, we will explain the procedure for assembling the conductive module 103. First, we will explain the procedure for assembling the voltage detection unit 105 to the conductive plate 104. To assemble the voltage detection unit 105 to the conductive plate 104, first, the voltage detection terminal 110 and the cover 130 are assembled to the first housing 140 to complete the voltage detection unit 105, and then the completed voltage detection unit 105 is connected to the conductive plate 104.

[0051] To assemble the voltage detection terminal 110 and the cover 130 to the first housing 140, first, the voltage detection terminal 110, to which the electric wire 120 has been connected in advance by a method such as ultrasonic bonding or welding, is accommodated in the terminal accommodating recess 142 of the first housing 140. To this end, the voltage detection terminal 110 is fitted from above into the terminal accommodating recess 142 of the first housing 140 so that the protrusion 113 enters the locking groove 145 and one end (contact point) of the electric wire 120 enters the through-hole 144. When the voltage detection terminal 110 has been accommodated in the first housing 140, the upper and lower surfaces of the tip 112a of the voltage detection terminal 110 are exposed by the notch 143.

[0052] Next, the electric wire 120 extending from the voltage detection terminal 110 accommodated in the first housing 140 is accommodated in the electric wire accommodating recess 146 of the first housing 140. For this purpose, the electric wire 120 is fitted from above along the electric wire accommodating recess 146 which is composed of a pair of straight portions 147 and a bent portion 148. At this time, by pushing the pair of portions of the electric wire 120 located at the top of the pair of narrow recesses 151 downward, the pair of portions of the electric wire 120 are accommodated inside the pair of narrow recesses 151. When the accommodation of the electric wire 120 in the first housing 140 is completed, the electric wire 120 extends rearward from the electric wire outlet 149 to the outside of the first housing 140.

[0053] Next, the cover 130 is attached to the first housing 140. For this purpose, the cover 130 is attached from the right side to the cover attachment recess 141 of the first housing 140 so that the facing portions 131 of the cover 130 sandwich the cover attachment recess 141 on the top and bottom surfaces of the first housing 140 from above and below, so that the extending portions 132 of the cover 130 cover the cover attachment recess 141 on the top surface side of the first housing 140, and so that the pair of wire holding pieces 135 of the cover 130 are housed in the pair of wire holding piece recesses 152 of the first housing 140.

[0054] In the process of attaching the cover 130 to the first housing 140, the locking portion 136 of the cover 130 first slides on the bottom surface 141a of the cover attachment recess 141 on the underside of the first housing 140, and then enters into the temporary locking portion 154 and engages with it. This causes the cover 130 to be locked to the first housing 140 at the temporary locking position, completing the attachment of the cover 130 to the first housing 140 and obtaining the voltage detection unit 105. As will be described later, the voltage detection unit 105 obtained after the attachment of the cover 130 to the first housing 140 is completed (with the cover 130 locked in the temporary locking position) is used to assemble the conductive module 103 (see FIG. 1).

[0055] When the cover 130 is locked in the temporary locking position, the opposing portions 131 (more specifically, the pair of upper and lower extending portions 133b) of the cover 130 do not cover the tip portion 112a of the voltage detection terminal 110. Therefore, the upper and lower surfaces of the tip portion 112a of the voltage detection terminal 110 are still exposed by the notch 143.

[0056] Furthermore, the pair of wire holding pieces 135 of the cover 130 are arranged over the openings of the straight portion 147 and part of the bent portion 148 of the wire accommodating recess 146. This prevents the wire 120 from slipping out of the wire accommodating recess 146. Furthermore, the extending ends of the pair of wire holding pieces 135 are received in the pair of storage holes 153. This prevents the pair of wire holding pieces 135 from shifting in position or from unintentionally deforming the pair of wire holding pieces 135 away from the wire accommodating recess 146. Furthermore, the extending portion 132 of the cover 130 is arranged over the opening of the bent apex 148a of the bent portion 148 of the wire accommodating recess 146. This effectively prevents the wire 120 from slipping out of the wire accommodating recess 146 and being routed so as to straddle the bent portion 148 (i.e., to shortcut the bent portion 148). In this way, the possibility of the specific problem occurring due to the wire 120 slipping out of the bent portion 148 of the wire receiving recess 146 can be reduced.

[0057] When cover 130 is pushed further to the left relative to first housing 140 while it is locked in the temporary locking position, the extending ends of the pair of wire holding pieces 135 of cover 130 enter further into the pair of storage holes 153 and are stored therein, and locking portions 136 of cover 130 climb over temporary locked portions 154 and then enter inside and engage with full locked portions 155 (see FIG. 6). As a result, cover 130 is locked to first housing 140 in the full locking position.

[0058] 5 and 6, when the cover 130 is locked in the full locking position, the entire area of ​​the cover mounting recess 141 is covered by the cover 130, and the entire electric wire accommodating recess 146 is covered by the extending portion 132 of the cover 130. This prevents the electric wire 120 from slipping out of the electric wire accommodating recess 146. Furthermore, as shown in FIG. 6, the facing portion 131 of the cover 130 (more specifically, the pair of upper and lower extending portions 133b) covers the upper and lower surfaces of the tip portion 112a of the voltage detection terminal 110. This means that the entire voltage detection terminal 110 is covered by the facing portion 131 of the cover 130, so that the voltage detection terminal 110 can be reliably protected.

[0059] As described above, the voltage detection unit 105 obtained after the cover 130 has been attached to the first housing 140 (with the cover 130 locked in the provisionally locked position) is used to assemble the conductive module 103 (see FIG. 1). Specifically, first, as shown in FIGS. 2 and 3, the flange portion 104a of the conductive plate 104 is fitted into the recessed portion 105a of the voltage detection unit 105, thereby connecting the voltage detection unit 105 to the right side of the conductive plate 104.

[0060] In this state, as can be seen from Figure 3, a portion of the flange portion 104a of the conductive plate 104 is positioned so as to overlap the underside of the tip portion 112a of the voltage detection terminal 110, and due to the presence of the notch 143 in the first housing 140, the upper surface of the tip portion 112a of the voltage detection terminal 110 is exposed upward, and the lower surface of a portion of the flange portion 104a of the conductive plate 104 is exposed downward.

[0061] Next, using the upper surface of tip portion 112a of voltage detection terminal 110 exposed upward and the lower surface of part of flange portion 104a of conductive plate 104 exposed downward, tip portion 112a of voltage detection terminal 110 and part of flange portion 104a of conductive plate 104 are fixed together by ultrasonic bonding, welding, or other method. Thereafter, cover 130 is moved from the provisional locking position to the full locking position, completing the assembly of voltage detection unit 105 to conductive plate 104.

[0062] Next, a description will be given of the procedure for assembling the temperature detection unit 106 to the conductive plate 104. To assemble the temperature detection unit 106 to the conductive plate 104, first, the second housing 160 is connected to the conductive plate 104, and then the thermistor 170 is assembled to the second housing 160.

[0063] 7, in order to connect the second housing 160 to the conductive plate 104, the flange portion 104b of the conductive plate 104 is fitted into the recessed portion 106a of the second housing 160. As a result, the second housing 160 is connected to the left side of the conductive plate 104. When the conductive plate 104 and the second housing 160 are connected to each other, the right end of the first recessed portion 162 of the thermistor accommodating recess 161 communicates with a part of the recessed portion 106a in the front-rear direction, and therefore the part 104b of the conductive plate 104 is exposed in the recessed groove at the right end of the first recessed portion 162 (see FIGS. 7 and 10).

[0064] Next, the thermistor 170 is assembled into the second housing 160. For this purpose, the case 172 holding the thermistor element 171 is fitted into the second recess 163 from above so that the pair of holding portions 174 (more specifically, the pair of side wall portions 176) of the case 172 enter the through-hole 165, the top plate portion 173 closes the opening of the second recess 163 of the thermistor accommodating recess 161, the extending plate portion 182 closes the opening of the communicating recess 164, the electric wire 190 extending from the thermistor element 171 extends to the outside of the second housing 160 through the communicating recess 164, and the four locking projections 179 of the case 172 are respectively locked in the four locking holes 166 of the second recess 163.

[0065] 10 , when the thermistor 170 is completely accommodated in the second housing 160, the thermistor element 171 is positioned closer to the portion 104b of the conductive plate 104 exposed in the groove of the first recess 162 than the case 172, and one longitudinal end of the thermistor element 171 is exposed in the groove at the boundary between the first recess 162 and the second recess 163 while being disposed in close proximity to the portion 104b of the conductive plate 104. In other words, the thermistor 170 is accommodated in the housing 160 in an attitude tilted with respect to the front-to-rear direction so that the thermistor element 171 approaches the conductive plate 104. In other words, the portion 104b of the conductive plate 104 and one longitudinal end of the thermistor element 171 are exposed in close proximity to each other in the groove of the thermistor accommodating recess 161.

[0066] Next, as shown in FIGS. 11 to 14, a heat-conductive sealant 183 having a suitable viscosity is applied to the upper and lower surfaces of the second housing 160 and filled into the groove of the thermistor accommodating recess 161 (more specifically, the gap area within the groove excluding the area occupied by the thermistor 170 and the portion 104b of the conductive plate 104). The material constituting the sealant 183 has superior heat conductivity to the material constituting the second housing 160. The sealant 183 is sufficiently soft when filled and hardens over time. In this example, the sealant 183 is further applied to the upper and lower surfaces of the second housing 160 in a pair of strips extending in the front-rear direction and spaced apart in the left-right direction (see FIG. 11). Here, as shown in Figure 14, the movement of the sealing material 183 filled in the groove of the thermistor accommodating recess 161 toward the rear side (the other side in the longitudinal direction of thermistor 170; left side in Figure 14) is blocked by a pair of rear wall portions 177 provided on the case 172, thereby preventing the sealing material 183 filled in the groove of the thermistor accommodating recess 161 from leaking out of the second housing 160 through the communicating recess 164.

[0067] By filling the groove of the thermistor accommodating recess 161 with the sealant 183 in this manner, as shown in FIG. 13 , the sealant 183 comes into contact with both the thermistor element 171 and the portion 104b of the conductive plate 104, which are exposed in the groove of the thermistor accommodating recess 161. This reduces the likelihood of an air gap impeding heat transfer between the thermistor element 171 and the portion 104b of the conductive plate 104, as compared to when the thermistor element 171 and the portion 104b of the conductive plate 104 are simply arranged side by side. This allows the thermistor 170 to accurately measure the temperature of the conductive plate 104 (in other words, for example, in a stacked-type energy storage device 101, the temperature of the energy storage module 102 transmitted through the conductive plate 104). Furthermore, because the thermistor element 171 is located closer to the portion 104b of the conductive plate 104 than the case 172, the case 172, which could impair heat transfer, is not placed between the thermistor element 171 and the portion 104b of the conductive plate 104. This further improves the accuracy of temperature measurement by the thermistor 170. The sealing material 183 also has the effect of preventing the thermistor 170 from unintentionally slipping out of the thermistor accommodating recess 161. This completes the assembly of the temperature detection unit 106 to the conductive plate 104.

[0068] Either the procedure for assembling the voltage detection unit 105 to the conductive plate 104 or the procedure for assembling the temperature detection unit 106 to the conductive plate 104 may be performed first. When both the procedure for assembling the voltage detection unit 105 to the conductive plate 104 and the procedure for assembling the temperature detection unit 106 to the conductive plate 104 have been performed, the assembly of the conductive module 103 is complete.

[0069] The conductive module 103 obtained in this manner is used to assemble the electricity storage device 101 shown in Fig. 1. Specifically, the electricity storage modules 102 and the conductive modules 103 are stacked alternately in the vertical direction, and the stack is fixed with predetermined metal fittings or the like to obtain the electricity storage device 101.

[0070] 13 , when the power storage modules 102 and the conductive modules 103 are stacked alternately in the vertical direction, the sealant 183 applied in strips on the upper and lower surfaces of the second housing 160 is pressed against the vertically adjacent power storage modules 102, thereby continuously spreading over almost the entire upper and lower surfaces of the second housing 160. This improves the sealing (waterproofing) between the vertically adjacent power storage modules 102 and conductive modules 103. Similarly, the sealant 183 filled in the thermistor accommodating recess 161 is pressed against the power storage module 102 adjacent above, thereby filling the gap region in the thermistor accommodating recess 161 with even more density. This makes it even less likely that an air layer that hinders heat transfer will exist between the thermistor element 171 and the part 104b of the conductive plate 104. As a result, the thermistor 170 can measure the temperature of the conductive plate 104 (in other words, for example, the temperature of the power storage module 102 transmitted through the conductive plate 104 in the stacked power storage device 101) with even greater accuracy.

[0071] <Actions and Effects> As described above, with the conductive module 103 and the power storage device 101 according to this embodiment, the voltage detection terminal 110, with the electric wire 120 connected to the tip end 111a, is accommodated in the terminal accommodating recess 142 of the first housing 140, and the cover 130 can be engaged with the first housing 140 with the tip end 112a of the voltage detection terminal 110 exposed. Therefore, when electrically connecting the voltage detection unit 105 to the conductive plate 104 serving as the detection target (e.g., the conductive plate 104 used in the stacked power storage device 101), for example, the voltage detection unit 105 can be assembled to the conductive plate 104, and then the exposed tip end 112a of the voltage detection terminal 110 can be fixed to the conductive plate 104 using a method such as ultrasonic bonding or welding. This eliminates the need for additional components for connection compared to typical bolt fastening, and also simplifies alignment between the two and reduces contact resistance at the contact points compared to the conventional connection method described above. Furthermore, after connecting the conductive plate 104 and the voltage detection terminal 110, by placing the cover 130 in the main locking position, the tip 112a of the voltage detection terminal 110 (i.e., the contact point between them) can be covered and protected by the cover 130.

[0072] Furthermore, by accommodating the thermistor 170 in the thermistor accommodating recess 161 of the second housing 160, the thermistor element 171 and a portion 104b of the conductive plate 104 are disposed in the recessed groove of the thermistor accommodating recess 161, and a heat-conductive sealant 183 is disposed in the recessed groove so as to contact both the thermistor element 171 and the portion 104b of the conductive plate 104. This makes it less likely that an air gap will be formed between the thermistor element 171 and the conductive plate 104, which would hinder heat transfer, compared to when the thermistor element 171 and the conductive plate 104 are simply disposed adjacent to each other. This allows the thermistor 170 to accurately measure the temperature of the conductive plate 104 (in other words, for example, in a stacked-type power storage device 101, the temperature of the power storage module 102 transmitted through the conductive plate 104).

[0073] Therefore, the conductive module 103 and the power storage device 101 according to this embodiment have excellent workability in conductive connection with the conductive plate 104, which is the detection target. Furthermore, the conductive module 103 and the power storage device 101 according to this embodiment can improve the accuracy of temperature measurement by the thermistor 170.

[0074] Furthermore, the thermistor 170 is accommodated in the thermistor accommodating recess 161 of the second housing 160 with the thermistor element 171 closer to the conductive plate 104 than the case 172, so the case 172, which may impair heat transfer, is not disposed between the thermistor element 171 and the conductive plate 104. This further improves the accuracy of temperature measurement by the thermistor 170.

[0075] <Other forms> It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the above-described embodiments, and modifications, improvements, etc. are possible as appropriate. In addition, the material, shape, dimensions, number, location, etc. of each component in the above-described embodiments are arbitrary and not limited as long as the present invention can be achieved.

[0076] Here, the features of the embodiments of the conductive module 103 and the electricity storage device 101 according to the present invention described above will be briefly summarized and listed below in [1] to [3].

[0077] [1] A conductive plate (104); a voltage detection terminal (110) having a first portion (112a) electrically connected to the conductive plate (104); a temperature detector (170) having a temperature sensor (171) and a case (172) for holding the temperature sensor (171); a plate-shaped housing (140, 160) that is assembled to the conductive plate (104), the plate-shaped housing having a terminal accommodating recess (142) that accommodates the voltage detection terminal (110) and a temperature detector accommodating recess (161) that accommodates the temperature detector (170); a heat-conductive filler (183) disposed in the recessed groove of the temperature measuring device receiving recess (161); a cover (130) that can be engaged with the housing (140) at a temporary engagement position that does not cover the first location (112a) of the voltage detection terminal (110) accommodated in the terminal accommodating recess (142) and at a full engagement position that covers the first location (112a); an electric wire (120) electrically connected to the second portion (111a) of the voltage detection terminal (110) and extending outward from the housing (140); A conductive module (103) comprising: The housing (160) A part of the conductive plate (104) is exposed in the groove of the temperature measuring device receiving recess (161), The filler (183) is The temperature measuring element (171) is arranged to contact both the temperature measuring element (171) and the part of the conductive plate (104). A conductive module (103).

[0078] According to the conductive module having the configuration [1] above, the voltage detection terminal, to which the electric wire is connected at the second location, is accommodated in the terminal accommodation recess of the housing, and the cover can be engaged with the housing while the first location of the voltage detection terminal is exposed. Therefore, when electrically connecting the voltage detection unit to a conductive plate (e.g., a conductive plate used in a stacked-type energy storage device) as a detection target, the voltage detection unit can be assembled to the conductive plate, and the exposed first location of the voltage detection terminal can be fixed to the conductive plate using techniques such as ultrasonic bonding or welding. This eliminates the need for additional connection components compared to typical bolt fastening, and facilitates alignment of the two and reduces contact resistance at the contact points compared to the conventional connection methods described above. Furthermore, after connecting the conductive plate and the voltage detection terminal, placing the cover in the fully engaged position allows the first location of the voltage detection terminal (i.e., the contact point between the two) to be covered and protected by the cover.

[0079] Furthermore, by accommodating the thermometer in the thermometer accommodating recess of the housing, the temperature measuring element of the thermometer and a portion of the conductive plate exposed in the groove of the thermometer accommodating recess are both placed in the groove, and a heat-conductive filler (e.g., a sealant that is soft when filled and hardens over time) is placed in the groove so as to contact both the temperature measuring element and the portion of the conductive plate. This makes it less likely that an air gap will form between the two, which would hinder heat transfer, compared to when the temperature measuring element and the conductive plate are simply placed next to each other. This allows the thermometer to accurately measure the temperature of the conductive plate (in other words, for example, the temperature of the energy storage module transmitted through the conductive plate in a stacked energy storage device).

[0080] Therefore, the conductive module of this configuration is easy to work with in conductive connection to the detection object. Furthermore, the conductive module of this configuration can improve the accuracy of temperature measurement by the thermometer.

[0081] [2] In the conductive module (103) described in [1] above, The temperature detector (170) The temperature measuring element (171) is accommodated in the temperature measuring device accommodating recess (161) of the housing (160) in an orientation in which the temperature measuring element (171) is closer to the conductive plate (104) than the case (172). A conductive module (103).

[0082] According to the conductive module having the configuration [2] above, no case that can impair heat transfer is placed between the temperature measuring element and the conductive plate, which further improves the temperature measurement accuracy of the thermometer.

[0083] [3] The conductive module (103) according to [1] or [2] above; a chargeable and dischargeable storage module (102) on which the conductive module (103) is stacked; The power storage device (101) includes:

[0084] According to the energy storage device having the configuration [3] above, the voltage detection terminal, to which the electric wire is connected at the second location, is accommodated in the terminal accommodation recess of the housing, and the cover can be engaged with the housing while the first location of the voltage detection terminal is exposed. Therefore, when electrically connecting the voltage detection unit to a conductive plate (e.g., a conductive plate used in a stacked energy storage device) as a detection target, the voltage detection unit can be assembled to the conductive plate, and then the exposed first location of the voltage detection terminal can be fixed to the conductive plate using techniques such as ultrasonic bonding or welding. This eliminates the need for additional connection components compared to typical bolt fastening, and facilitates alignment between the two and reduces contact resistance at the contact points compared to the conventional connection methods described above. Furthermore, after connecting the conductive plate and the voltage detection terminal, placing the cover in the fully engaged position allows the first location of the voltage detection terminal (i.e., the contact point between the two) to be covered and protected by the cover.

[0085] Furthermore, by accommodating the thermometer in the thermometer accommodating recess of the housing, the temperature measuring element of the thermometer and a portion of the conductive plate exposed in the groove of the thermometer accommodating recess are both placed in the groove, and a heat-conductive filler (e.g., a sealant that is soft when filled and hardens over time) is placed in the groove so as to contact both the temperature measuring element and the portion of the conductive plate. This makes it less likely that an air gap will form between the two, which would hinder heat transfer, compared to when the temperature measuring element and the conductive plate are simply placed next to each other. This allows the thermometer to accurately measure the temperature of the conductive plate (in other words, for example, the temperature of the energy storage module transmitted through the conductive plate in a stacked energy storage device).

[0086] Therefore, the power storage device of this configuration is excellent in workability for conductive connection to the detection object.Furthermore, the power storage device of this configuration can improve the accuracy of temperature measurement by a thermometer. [Explanation of symbols]

[0087] 101 Electricity storage device 102 Energy Storage Module 103 Conductive Module 104 Conductive plate 110 Voltage detection terminal 111a Tip (second location) 112a Tip (first location) 120 Electric wire 130 Cover 140 1st Housing (Housing) 142 Terminal receiving recess 160 Second Housing (Housing) 161 Thermistor accommodating recess (thermometer accommodating recess) 170 Thermistor (thermometer) 171 Thermistor element (temperature measuring element) 172 cases 183 Sealing material (filler)

Claims

1. A conductive plate; a voltage detection terminal having a first portion conductively connected to the conductive plate; a temperature measuring device having a temperature measuring element and a case for holding the temperature measuring element; a plate-shaped housing having a terminal accommodating recess for accommodating the voltage detection terminal and a temperature detector accommodating recess for accommodating the temperature detector, the plate-shaped housing being assembled to the conductive plate; a heat-conductive filler material disposed in the recessed groove of the temperature measuring device receiving recess; a cover that can be engaged with the housing at a temporary engagement position that does not cover the first location of the voltage detection terminal accommodated in the terminal accommodating recess, and at a full engagement position that covers the first location; an electric wire electrically connected to a second location of the voltage detection terminal and extending to the outside of the housing; A conductive module comprising: The housing includes: a portion of the conductive plate is exposed in the recessed groove of the thermometer accommodating recess, The filler is The temperature measuring element is arranged to contact both the temperature measuring element and the part of the conductive plate. Conductive module.

2. 2. The conductive module according to claim 1, The thermometer is The temperature measuring element is accommodated in the temperature measuring device accommodating recess of the housing in an orientation in which the temperature measuring element is closer to the conductive plate than the case. Conductive module.

3. The conductive module according to claim 1 or 2; a chargeable and dischargeable storage module in which the conductive modules are stacked; A power storage device comprising:

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